Installing rails 3.1.1 in ubuntu 10.04

Cheat Sheet for Ruby

I am jumping directly into obscure world of Ruby. Here is a cheat sheet for erb( embedded ruby). Hope it helps.

http://cheat.errtheblog.com/s/erb/

Commands to untar different types of files in Ubuntu

I had thought that simple commands which we often use might be lost somewhere deep in our ocean of thoughts.

1. Type at the command prompt
   

   $ tar xvzf fileName.tar.gz - for uncompress a gzip tar file (.tgz or .tar.gz)

   $ tar xvjf fileName.tar.bz2 - for uncompress a bzip2 tar file (.tbz or .tar.bz2)

   $ tar xvf fileName.tar - for uncompressed tar file (.tar)

   • x = eXtract, this indicated an extraction ( c = create to create )
   • v = verbose (optional) the files with relative locations will be displayed.
   • z = gzip-ped; j = bzip2-zipped
   • f = from/to file ... (what is next after the f is the archive file)




2. The files will be extracted in the current folder (most of the times in a folder with the name 'fileName'). 

Note: I have tested these in ubuntu 10.04 and I hope these commands work on other Linux OS's too.